Adjustable fastening assembly for door mirror having an auxiliary mirror

ABSTRACT

A fastening assembly for door mirror is provided. The door mirror has an auxiliary mirror including, at its rear, a longitudinal block including two slits and a knurled surface, and a scale. The assembly comprises a C-shaped frame comprising hingedly coupled upper and lower bars and upper and lower arms. Each arm includes in interior knurled surface. The upper and the lower arms and the auxiliary mirror are threadedly secured together for engaging the knurled surfaces. Responsive to fitting the door mirror in a space confined by the bars and the arms by adjusting positions of the knurled surfaces of the arms relative to the knurled surface of the block by performing an unfastening and fastening of the arms and the block by observing the scale, fasten the door mirror in the space by tightening elastic straps over the rear of the door mirror.

CROSS REFERENCE

[0001] This application is a continuation-in-part of U.S. application Ser. No. 10/426,888, filed Apr. 30, 2003.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a mechanism for fastening door mirror of a motor vehicle and more particularly to a frame of door mirror having a mechanism adapted to adjust the height thereof for fastening the door mirror and its auxiliary mirror.

[0004] 2. Description of Related Art

[0005] As shown in FIGS. 8 and 9, U.S. application Ser. No. 10/426,888, filed on Apr. 30, 2003, entitled “Adjustable Fastening Mechanism for Door Mirror Having An Auxiliary Mirror”, disclosed an adjustment operation of the mechanism for being adapted to different sized door mirrors 9. In a case that the door mirror 9 is relatively large a user can first detach the cap 6 and the trigger member 7 from the frame. Next, pull the upper arm 4 a suitable distance from the lower arm 5 by moving the knurled surface 44 relative to the knurled surface 54 or vice versa until height of the door mirror 9 is about equal to a distance between the upper and lower bars 2 and 3. Next, put the cap 6 onto the knurled surfaces 54 and 44 for covering with the T-shaped projection 62 snapped into the T-shaped cavity 84, and drive the screw portion of the trigger member 7 through the aperture 61 and the channels 55 and 45 into the nut 83 for fastening the auxiliary mirror 8 and the frame together. Next, fit the door mirror 9 in a space confined by the upper bar 2, the lower bar 3, the upper arm 4, and the lower arm 5. Finally, snap the snap fasteners 33 onto the risers 26 by crossing the elastic straps 32 over the rear surface of the door mirror 9 prior to stretching the elastic straps 32. As an end, the door mirror 9 is secured between the upper and lower bars 2 and 3. In another case that the door mirror 9 is relatively small a similar adjustment operation can be performed. In brief, the door mirror 9 can be reliably secured between the upper and lower bars 2 and 3 by adjusting the mechanism. Thus, continuing improvements in the exploitation of the adjustment of door mirror are constantly being sought.

SUMMARY OF THE INVENTION

[0006] It is an object of the present invention to provide a fastening assembly for a door mirror of a motor vehicle, the door mirror having an auxiliary mirror including, at its rear side, a longitudinal block adjacent an inner side, the block including two slits open to front and rear sides, and a first knurled surface on its rear surface, and a scale in the form of a plurality of markings on an inner side, the fastening assembly comprising a substantially C-shaped frame comprising an upper bar including two L-shaped latch members extended downward from an underside, two risers on a top surface, and a first bifurcation at one end; a lower bar including two L-shaped latch members on a top surface, two elastic straps extended from undersides of the latch members, each elastic strap having a snap fastener at an open end, and a second bifurcation at one end; an upper arm including an upper connecting end piece hingedly coupled to the first bifurcation, a longitudinal first groove, a lower lateral channel in communication with the first groove, and a second knurled surface at an inner surface of the first groove; and a mated lower arm including a lower connecting end piece hingedly coupled to the first bifurcation, a longitudinal second groove, an upper lateral channel in communication with the second groove, and a third knurled surface at an inner surface of the second groove wherein the upper and the lower arms and the auxiliary mirror are fastened together by driving upper and lower bolts through the slits and the channels into upper and lower nuts respectively so as to engage the first knurled surface with the first and the third knurled surfaces, wherein the snap fasteners are snapped onto the risers by crossing the elastic straps over a rear surface of the door mirror prior to stretching the elastic straps for fastening the door mirror in a space confined by the upper and the lower bars and the upper and the lower arms in response to fitting the door mirror in the space by adjusting positions of the second and the third knurled surfaces relative to the first knurled surface by performing an unfastening and fastening of the bolt and nut combinations at least one time by observing the markings of the scale.

[0007] The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008]FIG. 1 is an exploded view of a preferred embodiment of frame having a mechanism for adjustably fastening a door mirror according to the invention;

[0009]FIG. 2 is an assembled view of FIG. 1 and a door mirror to be assembled;

[0010]FIG. 3 is an assembled view of FIG. 2;

[0011]FIG. 4 is a rear plan view of FIG. 3, where a door mirror having a smaller width is shown and a portion confined by a circle is greatly enlarged;

[0012]FIG. 5 is a cross-sectional view taken along line I-I of FIG. 4;

[0013]FIG. 6 is a view similar to FIG. 4, where a door mirror having a larger width is shown;

[0014]FIG. 7 is a cross-sectional view taken along line II-II of FIG. 5;

[0015]FIG. 8 is an exploded view of the frame of U.S. application Ser. No. 10/426,888; and

[0016]FIG. 9 is an assembled view of frame shown in FIG. 8 and a door mirror.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Referring to FIGS. 1 to 5, there is shown a door mirror frame constructed in accordance with the invention. The frame has an adjustable fastening assembly 1 for a door mirror 9 having an auxiliary mirror 8 of a motor vehicle. The frame is substantially C-shaped and comprises an upper bar 2 including two L-shaped latch members 21 extended downward from an underside, two risers 26 on a top surface, and a bifurcation 24 at one end, the bifurcation 24 having a transverse aperture 25; a lower bar 3 including two L-shaped latch members 31 on top, two elastic straps 32 extended from undersides of the latch members 31, each elastic strap 32 having a snap fastener 33 at its open end, and a bifurcation 34 at one end, the bifurcation 34 having a transverse aperture 35; an upper arm 4 including an upper connecting end piece 41 having an aperture 42, a longitudinal groove 43, a lower lateral channel 45 in communication with the groove 43, and a knurled surface 44 at an inner surface of the groove 43; a mated lower arm 5 including a lower connecting end piece 51 having an aperture 52, a longitudinal groove 53, an upper lateral channel 55 in communication with the groove 53, and a knurled surface 54 at an inner surface of the groove 53; and an elongate flat member 7 having a central hole 71. Also, the auxiliary mirror 8 at its rear side comprises a warning light 87 adjacent an outer side, a longitudinal block 81 adjacent an inner side, the block 81 including two slits 83 open to front and rear sides, a knurled surface 82 on its rear surface, and a lateral hole 85 between the slits 83 open to front and rear sides, a slot 84 in a forward side opposite the block 81, and a scale 86 in the form of a plurality of markings on an inner side.

[0018] In assembly, connect the bifurcation 34 and the lower connecting end piece 51 together by fastening a bolt and nut combination 27 through the apertures 35 and 52, connect the bifurcation 24 and the upper connecting end piece 41 together by fastening another bolt and nut combination 27 through the apertures 25 and 42, assemble the upper and the lower arms 4 and 5 and the auxiliary mirror 8 together by driving upper and lower bolts 61 through the slits 83 and the channels 45 and 55 into the upper and lower nuts 6 respectively in which the knurled surface 82 is engaged with the knurled surfaces 44 and 54, and drive a screw 72 through the hole 71 into the hole 85 for fastening the flat member 7 in the slot 84. This completes the fastening of the auxiliary mirror 8 and the frame. Next, fit the door mirror 9 in a space confined by the upper bar 2, the lower bar 3, the upper arm 4, and the lower arm 5. Finally, snap the snap fasteners 33 onto the risers 26 by crossing the elastic straps 32 over a rear surface of the door mirror 9 prior to stretching the elastic straps 32 for tightening. As an end, the door mirror 9 is secured between the upper and the lower bars 2 and 3.

[0019] Referring to FIGS. 4, 5, 6, and 7, an adjustment operation of the assembly for being adapted to different sized door mirrors 9 will be described. As shown in FIGS. 4 and 5, in a case that the door mirror 9 has a smaller width a user can first unfasten the nuts 6 until the upper and the lower arms 4 and 5 are free to slide about the block 81. Next, slide the arms 4 and 5 (i.e., the knurled surfaces 54 and 44) toward each other with the knurled surfaces 54 and 44 being moved relative to the knurled surface 82 and thus reduce a distance between the upper and the lower bars 2 and 3 until the door mirror 9 is snugly fitted between the upper and the lower bars 2 and 3. Finally, fasten the nuts 6 and stretch the elastic straps 32 again for further tightening. As an end, the door mirror 9 is secured. In another case that the door mirror 9 has a wider width, a similar adjustment operation can be performed as shown in FIGS. 6 and 7. A user can first unfasten the nuts 6 until the upper and the lower arms 4 and 5 are free to slide about the block 81. Next, disengage the snap fasteners 33 from the risers 26 for loosening the elastic straps 32. Next, slide the arms 4 and 5 (i.e., the knurled surfaces 54 and 44) away from each other with the knurled surfaces 54 and 44 being moved relative to the knurled surface 82 and thus increase a distance between the upper and the lower bars 2 and 3 until the door mirror 9 is snugly fitted between the upper and the lower bars 2 and 3. Finally, fasten the nuts 6 and stretch the elastic straps 32 again for tightening. As an end, the door mirror 9 is secured. Note that the fitness of the door mirror 9 between the upper and the lower bars 2 and 3 can be precisely controlled by observing the markings of the scale 86. In brief, the door mirror 9 can be reliably secured between the upper and the lower bars 2 and 3 by adjusting the above assembly.

[0020] While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims. 

What is claimed is:
 1. A fastening assembly for a door mirror of a motor vehicle, the door mirror having an auxiliary mirror including, at its rear side, a longitudinal block adjacent an inner side, the block including two slits open to front and rear sides, and a first knurled surface on its rear surface, and a scale in the form of a plurality of markings on an inner side, the fastening assembly comprising: a substantially C-shaped frame comprising an upper bar including two L-shaped latch members extended downward from an underside, two risers on a top surface, and a first bifurcation at one end; a lower bar including two L-shaped latch members on a top surface, two elastic straps extended from undersides of the latch members, each elastic strap having a snap fastener at an open end, and a second bifurcation at one end; an upper arm including an upper connecting end piece hingedly coupled to the first bifurcation, a longitudinal first groove, a lower lateral channel in communication with the first groove, and a second knurled surface at an inner surface of the first groove; and a mated lower arm including a lower connecting end piece hingedly coupled to the first bifurcation, a longitudinal second groove, an upper lateral channel in communication with the second groove, and a third knurled surface at an inner surface of the second groove wherein the upper and the lower arms and the auxiliary mirror are fastened together by driving upper and lower bolts through the slits and the channels into upper and lower nuts respectively so as to engage the first knurled surface with the first and the third knurled surfaces, wherein the snap fasteners are snapped onto the risers by crossing the elastic straps over a rear surface of the door mirror prior to stretching the elastic straps for fastening the door mirror in a space confined by the upper and the lower bars and the upper and the lower arms in response to fitting the door mirror in the space by adjusting positions of the second and the third knurled surfaces relative to the first knurled surface by performing an unfastening and fastening of the bolt and nut combinations at least one time by observing the markings of the scale.
 2. The fastening assembly of claim 1, wherein the auxiliary mirror further comprises a warning light adjacent an outer side.
 3. The fastening assembly of claim 1, wherein the auxiliary mirror further comprises a slot in a forward side opposite the block for receiving the bolts. 